linux-kernel - Re: [linux-sunxi] Re: [PATCH 3/6] ARM: dts: sunxi: Add Allwinner A80 dtsi

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Date:	Wed, 24 Sep 2014 09:18:16 +0200
From:	Gregory CLEMENT <gregory.clement@...e-electrons.com>
To:	Chen-Yu Tsai <wens@...e.org>
CC:	linux-sunxi <linux-sunxi@...glegroups.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	devicetree <devicetree@...r.kernel.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Shuge <shuge@...winnertech.com>,
	Meng Zhang <kevin@...winnertech.com>, yhf@...rii.com,
	ctl@...rii.com
Subject: Re: [linux-sunxi] Re: [PATCH 3/6] ARM: dts: sunxi: Add Allwinner
 A80 dtsi

Hi Chen-Yu,


>>> +
>>> +     memory {
>>> +             reg = <0x20000000 0x40000000>;
>>
>> Usually, what we put there was the maximum amount of RAM that can be
>> handled by the SoC. I think that it can go above 1GB
> 
> With LPAE, it can handle 8GB. But the DT won't take 64bit values.
> I'm not sure how to get it in. I'll look around for examples.

You can have a look on what we did for Armada XP:

arch/arm/boot/dts/armada-370-xp.dtsi
arch/arm/boot/dts/armada-xp.dtsi
arch/arm/boot/dts/armada-xp-gp.dts

I created a skeleton64.dtsi for this case

Gregory


-- 
Gregory Clement, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com
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